Battery and electric apparatus

Abstract

Disclosed in the present application are a battery and an electric apparatus. The battery comprises a battery case, at least two rows of battery packs and a connecting structure, wherein the at least two rows of battery packs are located inside the battery case, each row of battery packs comprises a plurality of battery cells, and the two rows of battery packs are each provided with an output terminal busbar; and the connecting structure is located inside the battery case, the connecting structure is electrically connected to the output terminal busbars of the two rows of battery packs, and at least part of the connecting structure is in contact with the battery case. The connecting structure comprises a connecting body and a heat conduction layer, wherein the connecting body is electrically connected to the output terminal busbars of two adjacent rows of battery packs; the heat conduction layer is arranged on the connecting body, and at least part of the heat conduction layer is in contact with the battery case. The connecting structure connected to the output terminal busbars of the two rows of battery packs is in contact with the battery case, so that the heat of an output terminal busbar with the highest overcurrent temperature can be transferred to the battery case to realize the heat dissipation of the battery packs, thereby improving the reliability of the battery.

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202420380154.7, filed on February 29, 2024, entitled “Battery and Electrical Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0004] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric bicycles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes, and power tools. Battery cells can include nickel-cadmium battery cells, nickel-metal hydride battery cells, lithium-ion battery cells, and secondary alkaline zinc-manganese battery cells.

[0005] In the development of battery technology, how to improve battery reliability is an important research direction in battery technology.

[0006] Summary of the Invention

[0007] Embodiments of the present application provide a battery and an electrical device, which can improve the reliability of the battery.

[0008] In a first aspect, embodiments of the present application provide a battery comprising a battery case, at least two rows of battery packs, and a connection structure. The at least two rows of battery packs are located within the battery case, each row of battery packs comprising a plurality of battery cells, wherein the two rows of battery packs are each provided with an output busbar. The connection structure is located within the battery case and is electrically connected to the output busbars of the two rows of battery packs, with at least a portion of the connection structure contacting the battery case. The connection structure comprises a connection body and a thermally conductive layer, the connection body being electrically connected to the output busbars of the two adjacent rows of battery packs. The thermally conductive layer is disposed on the connection body, with at least a portion of the thermally conductive layer contacting the battery case.

[0009] In this solution, the connection structure connecting the output busbars of two rows of battery packs is in contact with the battery case. This allows heat from the output busbars (with the highest overcurrent temperature) to be transferred to the battery case, dissipating heat from the battery pack and improving battery reliability. The thermally conductive layer accelerates heat transfer, allowing heat from the output busbars to be quickly transferred to the battery case, improving the heat dissipation efficiency of the battery pack.

[0010] In some embodiments, the thermally conductive layer wraps around at least a portion of the outer circumference of the connection body.

[0011] In the above solution, the heat dissipation efficiency of the battery pack is further improved by increasing the area of ​​the heat-conducting layer.

[0012] In some embodiments, the heat-conducting layer is a heat-conducting insulating layer. The heat-conducting layer has insulating properties, which can prevent battery leakage to a certain extent, thereby further improving the reliability of the battery.

[0013] In some embodiments, the outer surface of the connecting body is wrapped with an insulating layer.

[0014] In the above solution, by wrapping the entire outer surface of the connection body with an insulating layer, the insulation performance of the connection structure is further improved, and the reliability of the battery is improved.

[0015] In some embodiments, the connection structure includes a connecting portion and a bending portion, the connecting portion is used to contact the battery box; the two bending portions are bent from the connecting portion toward the battery pack, and the bending portions are connected to the output bus bar in a one-to-one correspondence.

[0016] In the above solution, the bent portion is convenient for connection with the output bus above the battery pack. The connecting portion can be connected to the side of the battery box or to the crossbeam. The connecting portion does not need to occupy the space near the upper cover of the battery box, thereby providing more installation space for components such as wiring harnesses.

[0017] In some embodiments, the battery box includes a box body and a crossbeam located inside the box body and connected to the box body. The crossbeam is located on one side of the battery pack, and the connecting portion is in contact with the crossbeam.

[0018] In the above solution, the crossbeam can support the battery pack. By connecting the connecting part of the connecting structure to the crossbeam of the battery box, not only the connection stability between the connecting structure and the battery box can be strengthened, but also more space can be provided between the crossbeam and the side of the battery box, thereby saving space inside the battery box.

[0019] In some embodiments, the connecting portion bulges toward the crossbeam to form a bulge, and the bulge contacts the crossbeam.

[0020] In the above solution, by protruding the connecting portion toward the crossbeam, the heat transfer distance is reduced, thereby achieving the purpose of reducing thermal resistance.

[0021] In some embodiments, at least a heat-conducting layer is provided on the side of the raised portion facing the crossbeam, which can accelerate heat transfer so that the heat of the output bus can be quickly transferred to the battery box, thereby improving the heat dissipation efficiency of the battery pack.

[0022] In some embodiments, a pad is provided on the crossbeam, and the pad is detachably connected to the bent portion. The pad facilitates the connection between the crossbeam and the connecting structure, and the detachable connection facilitates maintenance and replacement.

[0023] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery according to any of the above embodiments, and the battery is used to provide electrical energy.

[0024] The above description is only an overview of the technical solution of this application. In order to more clearly understand the technical means of this application, it can be implemented in accordance with the contents of the specification. In order to make the features and advantages of this application more obvious and easy to understand, the specific implementation methods of this application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] FIG1 is a schematic diagram of a vehicle according to some embodiments of the present application;

[0027] FIG2 is a schematic structural diagram of a battery according to some embodiments of the present application;

[0028] FIG3 is a schematic structural diagram of the battery pack shown in FIG2 ;

[0029] FIG4 is a schematic diagram of a partial structure of a battery according to some embodiments of the present application;

[0030] FIG5 is a schematic structural diagram of a connection structure in some embodiments of the present application;

[0031] FIG6 is a cross-sectional view taken along line AA of FIG5 ;

[0032] FIG7 is a schematic diagram of a partial structure of batteries according to other embodiments of the present application;

[0033] FIG8 is a partial schematic diagram of a battery according to some embodiments of the present application.

[0034] Explanation of the accompanying drawings: Vehicle 1000; battery 100; controller 200; motor 300; upper cover 10; battery cell 20; housing 30; battery box 400; crossbeam 41; pad 42; battery pack 500; output bus 50; connecting structure 600; connecting body 61; thermal conductive layer 70; insulating layer 80; connecting portion 62; raised portion 621; bent portion 63; first direction X; second direction Y. DETAILED DESCRIPTION

[0035] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0036] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0037] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0038] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0039] In this application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0040] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery pack or battery pack. A battery generally includes a casing that encloses one or more battery cells. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0041] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet comprises a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The current collector uncoated with the positive active material layer protrudes from the current collector coated with the positive active material layer. The current collectors uncoated with the positive active material layer, when stacked, serve as the positive electrode tabs. For lithium-ion batteries, for example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet comprises a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The current collector uncoated with the negative active material layer protrudes from the current collector coated with the negative active material layer. The current collectors uncoated with the negative active material layer, when stacked, serve as the negative electrode tabs. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0042] The battery cells disclosed in the embodiments of this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery cells and batteries disclosed in this application can be used to improve the stability of battery performance and battery life.

[0043] The present invention provides an electric device that uses a battery as a power source. The electric device may include, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0044] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0045] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0046] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0047] Please refer to Figure 2, which is an exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a battery box and a battery cell 20. In some embodiments, the battery box may include an upper cover 10 and a box body 30, wherein the upper cover 10 and the box body 30 cover each other, and the upper cover 10 and the box body 30 together define a storage space for accommodating the battery cell 20. The box body 30 may be a hollow structure with one end open, and the upper cover 10 may be a plate-like structure, and the upper cover 10 covers the open side of the box body 30, so that the upper cover 10 and the box body 30 together define a storage space; the upper cover 10 and the box body 30 may also be hollow structures with one side open, and the open side of the upper cover 10 covers the open side of the box body 30. Of course, the box body formed by the upper cover 10 and the box body 30 can be of various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0048] FIG3 is a schematic diagram of the structure of the battery pack shown in FIG2 . In the battery 100 , there may be multiple battery cells 20 , and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. Mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in a box; of course, the battery 100 may also be a battery pack formed by first connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery packs are connected in series, in parallel, or in a mixed connection to form a whole, and then accommodated in a box. The battery 100 may also include other structures. For example, the battery 100 may also include a busbar component for achieving electrical connection between the multiple battery cells 20.

[0049] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be cylindrical, flat, rectangular, or in other shapes.

[0050] A battery pack consists of multiple battery cells, each of which is connected in series or parallel via a busbar. The battery is electrically connected to the high-voltage box via a busbar located at the output terminal. The high-voltage box can be installed within the battery box, with the output terminal busbar connected to the high-voltage box. External loads are then electrically connected to the battery via the high-voltage box. Because the output terminal busbar has the highest overcurrent temperature, thermal runaway and other accidents are more likely to occur at this location, reducing battery reliability.

[0051] In view of this, the present application provides a technical solution, in which the battery includes a battery box, at least two rows of battery packs and a connecting structure, the at least two rows of battery packs are located inside the battery box, each row of battery packs includes a plurality of battery cells, and the two rows of battery packs are respectively provided with output pole buses; the connecting structure is located inside the battery box, the connecting structure is respectively electrically connected to the output pole buses of the two rows of battery packs, and at least part of the connecting structure is in contact with the battery box.

[0052] In the above solution, by connecting the connection structure of the output busbars of the two rows of battery packs to the battery box, the heat of the output busbar with the highest overcurrent temperature can be transferred to the battery box, thereby achieving heat dissipation of the battery pack and improving the reliability of the battery.

[0053] FIG4 is a schematic diagram of a partial structure of a battery according to some embodiments of the present application.

[0054] As shown in Figure 4, in the first aspect, an embodiment of the present application provides a battery 100, which includes a battery box 400, at least two rows of battery packs 500 and a connecting structure 600, wherein the at least two rows of battery packs 500 are located inside the battery box 400, and each row of battery packs 500 includes a plurality of battery cells 20, wherein the two rows of battery packs 500 are respectively provided with an output pole bus 50; the connecting structure 600 is located inside the battery box 400, and the connecting structure 600 is respectively electrically connected to the output pole bus 50 of the two rows of battery packs 500, and at least a portion of the connecting structure 600 is in contact with the battery box 400.

[0055] At least two rows of battery packs 500 can be arranged sequentially along a first direction X. The multiple battery cells 20 in each row of battery packs 500 can be arranged sequentially along a second direction Y, with the first direction X and the second direction Y intersecting. The battery cells 20 in each row of battery packs 500 are connected in series or in parallel via busbars. Two rows of battery packs 500 are provided with output busbars 50, and the output busbars 50 of these two rows of battery packs 500 are connected via a connecting structure 600. For example, two rows of battery packs 500 are provided within the battery box 400, with output busbars 50 provided at both ends of the first row of battery packs 500 and the second row of battery packs 500. If the output pole bus 50 at the left end of the first row of battery packs 500 is a negative pole, it is used to connect to a high-voltage box, etc.; then the output pole bus 50 at the right end of the first row of battery packs 500 is a positive pole, and the output pole bus 50 at the right end of the second row of battery packs 500 is a negative pole. The output pole bus 50 at the right end of the first row of battery packs 500 is electrically connected to the output pole bus 50 at the right end of the second row of battery packs 500; then the output pole bus 50 at the left end of the second row of battery packs 500 is a positive pole, which is used to connect to a high-voltage box.

[0056] The connection structure 600 can be made of a conductive material such as metal to achieve electrical connection between the battery packs 500. The connection structure 600 and the output busbar 50 can be connected by bolts, snaps, welding, etc. The connection structure 600 can contact the side walls of the body 30 of the battery box 400 or the crossbeam 41 inside the battery box 400 to achieve heat transfer.

[0057] In the above scheme, by connecting the connection structure 600 of the output pole bus 50 of two adjacent rows of battery packs 500 to contact the battery box 400, the heat of the output pole bus 50 with the highest overcurrent temperature can be transferred to the battery box 400, thereby realizing heat dissipation of the battery pack 500 and improving the reliability of the battery 100.

[0058] FIG4 is a schematic diagram of a partial structure of a battery in some embodiments of the present application; FIG5 is a schematic diagram of the structure of a connection structure in some embodiments of the present application.

[0059] Please refer to Figures 4 and 5 in combination. In some embodiments, the connection structure 600 includes a connection body 61 and a heat-conducting layer 70. The connection body 61 is electrically connected to the output bus bars 50 of two adjacent battery packs 500 respectively; the heat-conducting layer 70 is arranged on the connection body 61, and at least a portion of the heat-conducting layer 70 is in contact with the battery box 400.

[0060] The thermally conductive layer 70 is made of a thermally conductive adhesive, such as silicone rubber, polyurethane, epoxy, or acrylic. The thermally conductive layer 70 may be provided only on the portion of the connector body 61 that contacts the battery case 400, or it may wrap around a portion of the connector body 61.

[0061] In the above solution, the heat conductive layer 70 can accelerate the heat transfer, so that the heat of the output bus 50 can be quickly transferred to the battery box 400, thereby improving the heat dissipation efficiency of the battery pack 500, and the heat conductive layer 70 also has an anti-wear effect.

[0062] In some embodiments, the heat conductive layer 70 wraps around at least a portion of the outer circumference of the connection body 61 .

[0063] The heat conductive layer 70 may be provided only on the periphery of the portion of the connection body 61 that contacts the battery box 400 , or may be provided on the periphery of the portion that contacts the battery box 400 and the peripheries of other portions.

[0064] In the above solution, by providing the heat-conducting layer 70 on at least a portion of the outer periphery of the connecting body 61 , the area of ​​the heat-conducting layer 70 is increased, thereby further improving the heat dissipation efficiency of the battery pack 500 .

[0065] In some embodiments, the thermally conductive layer 70 is a thermally conductive insulating layer 80 .

[0066] The material of the heat-conducting insulating layer 80 can be silicone, polyimide, polytetrafluoroethylene, rubber, ceramic, etc. The heat-conducting layer 70 has insulating properties, which can prevent the battery 100 from leaking electricity to a certain extent, further improving the reliability of the battery 100.

[0067] FIG6 is a cross-sectional view taken along line AA of FIG5 .

[0068] As shown in FIG. 6 , in some embodiments, the outer surface of the connection body 61 is wrapped with an insulating layer 80 .

[0069] The entire outer surface of the connection body 61 can be covered with an insulating layer 80, and then a heat conductive layer 70 can be provided outside the insulating layer 80. By covering the entire outer surface of the connection body 61 with the insulating layer 80, the insulation performance of the connection structure 600 is further improved, thereby improving the reliability of the battery 100.

[0070] FIG7 is a schematic diagram of a partial structure of batteries according to other embodiments of the present application.

[0071] As shown in Figure 7, in some embodiments, the connection structure 600 includes a connecting portion 62 and a bending portion 63, and the connecting portion 62 is used to contact the battery box 400; the two bending portions 63 are bent from the connecting portion 62 toward the battery pack 500, and the bending portions 63 are connected to the output bus 50 in a one-to-one correspondence.

[0072] The connecting portion 62 contacts the sidewall of the battery box 400 body 30, or contacts the side of the crossbeam 41 of the battery box 400. The bent portion 63 can be bent laterally from the upper end of the connecting portion 62. For example, the bent portion 63 can be bent to the left or right from the upper end of the connecting portion 62 to electrically connect to the output busbar 50 above. The bent portion 63 and the output busbar 50 can be connected by bolts, snaps, welding, etc.

[0073] In the above scheme, the bent portion 63 is convenient for connection with the output bus 50 above the battery pack 500, and the connecting portion 62 can be connected to the side of the battery box 400 or to the crossbeam 41. The connecting portion 62 does not need to occupy the space near the upper cover of the battery box 400, thereby providing more setting space for components such as wiring harnesses.

[0074] In some embodiments, the battery box 400 includes a box body 30 and a crossbeam 41 located inside the box body 30 and connected to the box body 30 . The crossbeam 41 is located on one side of the battery pack 500 , and the connecting portion 62 is in contact with the crossbeam 41 .

[0075] Crossbeams 41 can be provided at both ends of the battery pack 500, with the two crossbeams 41 sandwiching the battery pack 500 to securely support the battery pack 500. The connecting portion 62 can contact the side of the crossbeam 41, with the bent portion 63 located at the upper end of the crossbeam 41. The end of the output busbar 50 is bent downward and overlapped with the upper end of the crossbeam 41, with the bent portion 63 overlapping the upper side of the end of the output busbar 50. Alternatively, the bent portion 63 can be first overlapped with the upper end of the crossbeam 41, and then the end of the output busbar 50 can be overlapped above the bent portion 63.

[0076] The crossbeam 41 is spaced a certain distance from the sidewalls of the battery box 400 housing 30, and the connector 62 is located in this gap. Because the connector 62 is in contact with the crossbeam 41, there is still a certain gap between the connector 62 and the sidewalls of the housing 30 to accommodate other components such as the wiring harness in the battery box 400.

[0077] In the above solution, the crossbeam 41 can support the battery pack 500. By connecting the connecting portion 62 of the connecting structure 600 to the crossbeam 41 of the battery box 400, not only can the connection stability between the connecting structure 600 and the battery box 400 be enhanced, but also more space can be provided between the crossbeam 41 and the side of the battery box 400, thereby saving space inside the battery box 400.

[0078] FIG8 is a partial schematic diagram of a battery according to some embodiments of the present application.

[0079] As shown in FIG. 8 , in some embodiments, the connecting portion 62 bulges toward the beam 41 to form a bulge 621 , and the bulge 621 contacts the beam 41 .

[0080] The middle area of ​​the connecting portion 62 may be bent toward the side of the cross beam 41 to form a raised portion 621 , so that the raised portion 621 can be closer to the cross beam 41 .

[0081] In the above solution, by protruding the connecting portion 62 toward the beam 41 , the heat transfer distance is reduced, thereby achieving the purpose of reducing thermal resistance.

[0082] In some embodiments, at least a heat conducting layer 70 is disposed on a side of the raised portion 621 facing the beam 41 .

[0083] A thermal conductive layer 70 can be wrapped around the entire periphery of the raised portion 621, or a thermal conductive layer 70 can be provided only on the side of the raised portion 621 facing the beam 41. This can accelerate the transfer of heat so that the heat of the output bus 50 can be quickly transferred to the battery box 400, thereby improving the heat dissipation efficiency of the battery pack 500.

[0084] In some embodiments, a pad 42 is provided on the beam 41 , and the pad 42 is detachably connected to the bent portion 63 .

[0085] The pad 42 may be L-shaped, with one side of the pad 42 being in contact with the upper end of the beam 41 and the other side being in contact with the side of the beam 41. The pad 42 may also be flat and only be in contact with the upper end of the beam 41.

[0086] The spacer 42 can be secured to the crossbeam 41 by welding, bonding, or other methods. Threaded holes can be provided on the spacer 42, the output busbar 50, and the bent portion 63, respectively, and the bent portion 63 and the output busbar 50 can be bolted to the crossbeam 41. Alternatively, a buckle or hook structure can be provided on the spacer 42 to engage the output busbar, the bent portion 63, and the spacer 42.

[0087] The pad 42 of the embodiment of the present application facilitates the connection between the crossbeam 41 and the connecting structure 600 , and the detachable connection facilitates maintenance and replacement.

[0088] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery 100 according to any of the above embodiments, and the battery 100 is used to provide electrical energy.

[0089] According to some embodiments of the present application, a battery 100 is provided. The battery 100 includes a battery case 400, at least two rows of battery packs 500, and a connection structure 600. The at least two rows of battery packs 500 are located inside the battery case 400. Each row of battery packs 500 includes a plurality of battery cells 20, wherein the two rows of battery packs 500 are respectively provided with an output busbar 50. The connection structure 600 is located inside the battery case 400 and is electrically connected to the output busbars 50 of the two rows of battery packs 500, with at least a portion of the connection structure 600 contacting the battery case 400. The connection structure 600 includes a connection body 61 and a heat-conducting layer 70. The connection body 61 is electrically connected to the output busbars 50 of two adjacent battery packs 500. The heat-conducting layer 70 is provided on the connection body 61, with at least a portion of the heat-conducting layer 70 contacting the battery case 400.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery comprising: Battery box; At least two rows of battery packs are located inside the battery box, each row of battery packs includes a plurality of battery cells, and the two rows of battery packs are respectively provided with output busbars; a connecting structure located inside the battery box, the connecting structure being electrically connected to the output busbars of the two rows of battery packs, and at least a portion of the connecting structure being in contact with the battery box; The connection structure includes: A connecting body electrically connected to the output busbars of two adjacent rows of battery packs; A heat-conducting layer is provided on the connecting body, and at least a portion of the heat-conducting layer is in contact with the battery box.

2. The battery according to claim 1, wherein The heat-conducting layer wraps around at least a portion of the outer circumference of the connecting body.

3. The battery according to claim 1, wherein The heat-conducting layer is a heat-conducting insulating layer.

4. The battery according to claim 1, wherein The outer surface of the connecting body is wrapped with an insulating layer.

5. The battery according to any one of claims 1 to 4, wherein The connection structure includes: A connecting portion, configured to contact the battery box; The two bending portions are bent from the connecting portion toward the battery pack, and the bending portions are connected to the output busbars in a one-to-one correspondence.

6. The battery according to claim 5, wherein The battery box includes a box body and a crossbeam located inside the box body and connected to the box body. The crossbeam is located on one side of the battery pack, and the connecting portion is in contact with the crossbeam.

7. The battery according to claim 6, wherein The connection portion bulges toward the crossbeam to form a bulge, and the bulge contacts the crossbeam.

8. The battery according to claim 7, wherein At least a heat conducting layer is provided on a side of the raised portion facing the crossbeam.

9. The battery according to claim 6, wherein A pad is provided on the crossbeam, and the pad is detachably connected to the bending portion.

10. An electrical device comprising the battery according to any one of claims 1 to 9, wherein the battery is used to provide electrical energy.

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